Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Numerical study of fluid dynamic flow within an internal combustion engine cylinder
Submission Author:
Ana Marta Souza , MG , Brazil
Co-Authors:
Ana Marta Souza, Antônio César Valadares de Oliveira, Enrico Temporim Ribeiro, Francisco Souza, Marcelo Colombo Chiari
Presenter: Ana Marta Souza
doi://10.26678/ABCM.COBEM2017.COB17-1131
Abstract
Despite the significant advances in the automotive industry in recent year, there still improvements to be achieved, especially concerning the conversion of chemical energy into mechanical energy, which is a maximum of nearly 40% currently. A larger engine efficiency would also result in lower fuel consumption and lower emissions. The development of a rapid and complete combustion is one of the factors that could contribute to improve the engine efficiency. It is known the flow within the cylinder is an important parameter and the turbulence flow in the combustion chamber may increase the rate of flame spread significantly, contributing to efficient combustion. According to Heywood (1988), the burning of fuel in engines of Cycle Otto is more influenced by the movement of charge in the cylinder than the fuel properties (which does not mean that does not require both). Turbulence may be created or enhanced by one or more patterns inside the cylinder, such as swirl and tumble. In this context, the main goal of this work is to investigate the influence of different geometries of air intake port on the flow cylinder. Techniques of Computational Fluid Dynamics (CFD) were applied through the AVL/FIRE software. The results allowed observe that small changes in the air intake port are able to promote different flow patterns, favoring the formation of swirl or tumble.
Keywords
Internal combustion engine, Computational Fluid Dynamic (CFD), swirl, tumble
